general_fact: 1707 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 1707 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
trivia: 1707 is an unremarkable number.
historical_date: September 2nd is the day in 1811 that the University of Oslo is founded as The Royal Fredericks University, after Frederick VI of Denmark and Norway.